Electronics > Beginners
Charging
<< < (2/2)
sleemanj:
The plate on the left of your picture looks like a single plate selenium rectifier (what we would now use a diode for), it may well not be doing much in the way of rectification any more.


You may find this of use:
http://anoldtechniciansworkbench.blogspot.com/2013/01/one-amp-battery-charger.html

jmelson:

--- Quote from: sleemanj on November 30, 2019, 12:01:47 am ---The plate on the left of your picture looks like a single plate selenium rectifier (what we would now use a diode for), it may well not be doing much in the way of rectification any more.

--- End quote ---
it may also be working fine, just too leaky to show up any DC on a 1 Meg Ohm scope input.  Try putting a load like a 20 Ohm resistor (value not at all critical) or a car turn signal bulb on it as a load and try the scope again.

Jon
james_s:
That's exactly what I was going to suggest, put a load on it, IIRC those old selenium rectifiers are pretty leaky.

I would probably replace it with a modern diode if I were going to actually use the charger. If the selenium rectifier fails, which they sometimes do, you'll never forget that awful smell.
Ben sage:
I just found out from my dad that we have two of these chargers and this is the broken one So the one I tested does work but not this one and thanks guys for the great comments
james_s:
Replace the selenium rectifier with a sufficiently rated diode and that will fix it right up, there's not really anything else to go wrong.
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod